On 01/31/2012 09:02 AM, gene heskett wrote: >> NFS can use up all the CPU cycles trying to get a remount. I've seen >> that quite a few times, especially at boot time, when a system is trying >> to do an NFS mount on another system that's down at the time, and it >> just sits there forever until the other machine comes back up. The soft >> and retrans option allows the boot to continue after so many attempts, >> and then you can fix the problem once it's fully booted. >> >> Mark >> >> > But, this is _after_ the other machine had been rebooted for 15-20 minutes > when this one locked up, hence my tendency to think it wasn't related to > any traffic thru NFS at the time. I had just logged back in over ssh, done > a cd to a subdir and an ls. The next operation and I forget now what it > was, was over that ssh link, might have been an ls -l, completed ok, but > then the keyboard and mouse were gone, I looked over at the gkrellm strip, > it was frozen, I then reached and found the reset button. Had it been > synchronous to the shop machines reboot, that would have been another > critter entirely to this, IMO. > > Cheers, Gene > That's what is normally called a stale file handle. The "soft" attribute will help with that also. For whatever reason, when the server side was rebooted, the client did not cleanly dismount, or never dismounted the NFS mount. It's still trying to give you information from the last mount, which doesn't exist anymore, and it keeps trying to process the NFS commands. If you had done a manual "umount" then a manual "mount" of the NFS partition before trying to access it with the "ls" command it probably would have been okay. This is also where the automount facility can come in real handy too. Automount automagically umounts an NFS partition after a certain period of time of non-use. The NFS partition will then be automounted the next time you access it. Check out autofs. There are a lot of configuration settings that will make NFS mounts virtually painless.
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